Thiamine additive engineering enables improved film formation towards high efficiency and moisture stability in perovskite solar cells
نویسندگان
چکیده
Perovskite solar cells (PSCs) attract widespread research interest due to their exceptional properties. However, the instability of perovskite layer, especially moisture instability, and existing defects seriously restrict performance limit development PSCs towards commercialization. Herein, we fabricate moisture-stable efficient by incorporating a thiamine (THM) additive into lead iodide (PbI2) precursor using two-step spin-coating method. This strategy enables better interaction between THM PbI2. Then, higher energy barrier is produced when material reacts with A-site cations form crystals, resulting in larger grains better-quality films. Through optimization concentration additive, optimal achieves improved stability decreased trap states; thus, corresponding unencapsulated devices achieve remarkable power conversion efficiency (PCE) 21.40% maintain >92% initial PCE after 180 h ambient air (?50% humidity). The excellent mainly attributed fact that promotes crystal growth passivates
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ژورنال
عنوان ژورنال: Science China. Materials
سال: 2021
ISSN: ['2095-8226', '2199-4501']
DOI: https://doi.org/10.1007/s40843-021-1762-0